MG2S Installation Manual

34
Figure 28. MG2S Wiring Diagram
1 2 3
1 2 3
FLAME
ROLL-OUT
SUPPLY
AIR LIMIT
LOW
PRESSURE
SWITCH
HIGH
PRESSURE
SWITCH
11 22 33 44 55 66 77 88 99
FLAME SENSOR
24 V
120 V
WHITE
BLACK
WHITE W/ BLK STRIPES
BLK W/ WHITE STRIPES
1234
1234
IGNITOR
DOOR
SWITCH
1
2
1
2
TORQUE
MOTOR
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
WHITE
ORANGE
YELLOW
RED
BLACK
GAS
VALVE
LO
HI
C
INDUCER
H
L
C
123 123
R C
GND
RX
TX
W
RCY1 TWINDEHUM
HP
SPEED
COMMON
PWM
MODE
NONE NONE
R C
GND
RX
TX
W
W1
COOL
FAN SPEED
HEAT
11
4 1
8
7
10
5 2
9 3
12
6
LINE- N
XMFR-N
LINE
LINE
XMFR
EAC
HUM
LINE- N
143
25
R
C
TX
RX
W
COM
RCY/Y2 W2GW1Y1
BLWR OFF
DELAY
BROWN
GRAY
PART OF MOTOR
12
BLOWER
LIMIT
1 2 3 4
5
6
1 2 3 4
5
6
WHITE
BLACK
BLUE
WHITE W/ BLK STRIPES
BLK W/ WHITE STRIPES
BROWN W/ WHITE STRIPE
BLACK
BLACK
WHITE
WHITE
BROWN BROWN
RED
RED
ORANGE ORANGE
For 96% 2-Stage Fixed Speed Downflow Furnaces
WIRING DIAGRAM
1021492B
FIELD WIRING
LEGEND:
08/18
LOW VOLTAGE
HIGH VOLTAGE
(Replaces 1021492A)
BLUE
BLUE
BLUE
BLACK
BLACK 120V
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
WHITE
(NEUTRAL)
WHITE
WHITE
RED
RED
GREEN
GROUND
GREEN
YELLOW
BROWN
VIOLET
VIOLET
ORANGE
ORANGE
VENT LIMIT
Refer to the Installation Instructions provided with the kit for the proper heating and cooling speeds for your application.
If any of the origInal wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C. Use copper conductors only.
This wiring diagram shows connections and termination required for the blower kit only. Use in addition to the wiring diagram for the furnace.
Green LEDRed LED
Control Fault (No Power)Off Off L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault FlashOn Open Limit Switch Fault FlashOff Low Flame Sensor Signal Flame Present
Diagnostic Description
FAULT CONDITIONS
Diagnostic Description Yellow LED
Continuous Flash
On
Alternating Flash
ffOnO tluaF rotoM
RESISTOR
(ON SELECT
MODELS)
YELLOW YELLOW
GREEN
GREEN
BLUE
BLUE
BLUE
BLUE